// RUN: %swift -i %s | FileCheck %s
// REQUIRES: swift_interpreter
// XFAIL: *

// CHECK-NOT: Reallocations exceeded 30
func testReallocation() {
  var x = "The quick brown fox jumped over the lazy dog\n".split(' ')

  var story = "Let me tell you a story:"
  var laps = 5000

  var reallocations = 0
  for i in 0..laps {
    for s in x {
      var lastBase = story.str_value.base
      story += ' '
      story += s
      if lastBase != story.str_value.base {
        ++reallocations
        
        // To avoid dumping a vast string here, just write the first
        // part of the story out each time there's a reallocation.

        // Commenting these two lines out suppresses the bug
        var intro = story.split(':')[0] 
        println("reallocation \(reallocations), with intro \(intro)")
        
        if reallocations >= 30 {
          println("Reallocations exceeded 30")
          return
        }
      }
    }
    story += '.'
  }
  println("total reallocations = \(reallocations)")
}

testReallocation()
println("done!")